Improvement in auger-stops



S. G. DARE.

Auger-Stops.

Patented June 2,1874.

NITED STATES PATENT OFFICE.

SAMUEL G. DARE, OF GREEN POINT, BROOKLYN, NEV YORK.

IMPROVEMENT IN AUGER-STOPS.

Specification forming part of Letters Patent No. 151,571, dated June 2,1874; application filed April 28, 1874.

To all whom it may concern:

Be it known that I, SAMUEL G. DARE, of Green Point, in the city ofBrooklyn, county of Kings and State of New York, have invented a new anduseful Auger-Stop, of which the following is a specification:

My invention relates to an improved device for regulating the depth ofthe bore made by an auger by arresting the motion of the auger at therequired point, thereby enabling a-ny number of holes to be bored to auniform depth.

The invention consists in a pair of jaws hinged or pivoted together, andprovided with a locking device for attachment to the auger or bit, so asto revolve therewith, one of the j aws being provided with an adjustableplate, to enable the stop to be adjusted to angers ot' dierent sizes,and the stop being formed with legs to allow the escape of chips duringthe process of boring.

In the accompanying drawing, Figure 1 is a side view of an auger or bitwith my improved stop applied thereto. Fig. 2 is another side view,showing the stop in section. Fig. 3 is a top view oi the stop with theauger in section. i

A1 A2 represent two jaws, the inner edge of one of which is straight,and the outer edges ot' both maybe of semicircular or approximate form.These jaws are pivoted or hinged together at one side by a pivot, a, andat the opposite side are formed lugs b1 b2. To the lng b2 is pivoted oneend of a loop or stirrup, .0, the other end of which engages with thelug b1, and is provided with a set-screw, c, for adjusting the jaws. Asemicircular plate, D, having a bar, d, extending radially from itscurved edge, is arranged to work in a groove in the inner side of thejaw, with the bar d protruding through a slot in the jaw, so as toenable the plate D to be moved in a direction corresponding with theline of motion of the hinged jaws. when the jaws are closed, thestraight edge of the plate D and the stra-ight inner edge of the plateA2 are parallel with each other; and when the jaws are opened tocorrespond with bits of different thicknesses,

the plate D is adjusted with its straight edge parallel with thestraight edge of the jaw A2, as shown in Fig. 1. This stop is applied toan auger or bit by clamping the twisted portion between the jaws A1 A2at the point where it is desired to arrest the motion of the bit, thestop being held in place, and caused to turn with the bit, by placingthe loop O over the lng b2, and tightening the setscrew c, and the plateD being adjusted to correspond with the thickness of the bit. The jawshave legs fon their under sides, which come in contact with the work atthe end of the stroke, so as to leave a space between the work and thejaws for the escape of chips during the whole progress of the-work.

This invention will be found useful to workmen who use angers, bits, andother boringtools.

Heretofore, when desired to limit the depth of the bore, it has beencustomary to bore a hole through a block or bar of wood of suchthickness or length as to arrest the motion of the bit at a certainpoint. It was necessary in such case to have bars and blocks ofdifferent lengths and thicknesses to correspond with the differentrequired depths of bore and different sizes of bits.

My invention obviates the necessity for such and similar devices, as itcan be readily applied to bits and angers of different sizes byadjusting the plate D, and secured at any de sired point by means of thestirrup and setscrew engaging with the lug b1.

I claiml. rlhe jaws A1 A2, pivoted or hinged to gether at one side bythe pivot a, and fastened at the other side by means of the stirrup Cand setscrew c, as herein shown and described.

2. The combination, with the pivoted or hinged jaws, ot" the adjustableplate, whereby the stop may be applied to bits of different sizes,substantially as shown and described.

SAMUEL G. DARE. Titnessesz FRED. HAYNns, MICHAEL RYAN.

